Belt.



PATENTED FEB. :6, 1966.

5. RIDDELL.

BELT.

APYLIUATIGR FILED mu 9, 1904.

Witnesses: /nvenl30r:

' John i? 'da ll, by Earle many.

UNITED STATES PATENT OFFICE.

JOHN RIDDELL, OF SCHENEOTADY, NEW YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

BELT.

Specification of Letters Patent.

Patented Feb. 6, 1906.

Application filed July 9, 1904. Serial N-.215,3831

To all whom it may concern.-

Be it known that 1, JOHN RIDDELL, a citizen of the United States, residing at Schenectady, county of Schenectady, State of New sing e York, have invented certain new and useful Improvements in Belts, of which the followin is a specification.

his invention relates to belts for trans mitting power from one shaft to another in machinery. Its object is to provide a belt that is strong, elastic, and flexible, and it has been designed especially for use with pulleys having V -groo vessuch, for exam le, as ex pending pulleys in variable-spec gearing. The belt consists of an elastic coreconsisting, preferably, of one or more helical springs made of stiff but resilient Wire, with the turns close together. I prefer to use a plurality of these springs arranged parallel with each other, and on them are threaded a plurality of loose fiat Washers in sufficient numbers to stand with their faces in contact. The washers are preferably leather, though fiber or other suitable material ma be used. The shape of the washers depen s upon the crosssection of the surface on which the belt is to operate, being triangular for a V shaped groove.

In the accompanying drawings, Figure 1 is a perspective view of a iece of a belt embodying my invention. ig. 2 is a view of a washer. Fig. 3 shows a modification. Fig. 4 is/a section of an expanding pulley, showingthe belt applied thereto. Fig. 5 is a View similar to Fig. 3, showing another modification.

To make a triangular belt, I take three helical springs 1 2 3, made of st'if resilient wire, preferably steel, with the turns in close contact. Two of these, 1 2, are placed side b T side and the third, 3 equidistant from bet at a little distance. Over these springs are then slipped a lot of fiat tria ular washers a, of leather or the like, having else to accommodate the springs. Thus in Fig. 1 the two upjfer springs 1 2 are placed close together, so tht an B-s aped hole 5 is made for them in the washer, as shown in Fig. 2, while a se arate circular hole 6 is provided for the at or sprin 3. In Fig. 3 the three springs are equi istan't, lying in the angles of an equilateral triangle, so that the washer takes this shape with a separate circular hole for each spring. This shape of belt may be turned to run with any corner in the groove of the pulley, and thus distribute the wear. The washere lie closely together with their faces in contact. Their corners may be rounded ofl, if desired. After they have been threaded on the sprin s the ends of the latter are fastened together y brazing or otherwise to complete the belt. If any other section than triangular is adopted, the number and arrangement of the springs, the shape of the washers, and the arrangement of the hole or holes therein will of course be changed to correspond. In Fig. 5 I have shown round washers 4 and a single spring-core 4'.

In variable-speed gearing employing two expanding pulleys belted together trouble has been ex erienced in getting a belt that will keep tig it during the changes in the relative efl'ective diameters of the pulleys, since it is customary to enlarge one of them at the same rate that the other is contracted. This calls for a belt of varying length, for reasons well known to every mechanical en ineer familiar with belt-gearing on cone-pu eys. My belt is sufficiently elastic to provide for sue changes in length and has been found to work very satisfactorily under such condi- .tions. Fig. 4 shows it applied to an ex anding pulley comprising two halves 7, eac rovided with tapering ribs 8, which inter ock andenable the halves to be separated or appreached in order to produce a V-groove of var ing diameter.

hat I claim as new, and desire to secure by Letters Patent of the United States, is-

I. A. belt consisting of an elastic core and a covering of loose washers.

2. A belt havin an elastic core comprising one or more he ical springs, and a cover ing of loose washers.

A belt consisting of a plurality of parallel helical springs, and a plurality of loose washers assembled on the same in close contact. I

4. A belt consisting of a pluralit of parallel helical wire s rings havin their turns close together, an a p urality o loose leather washers strung on said springs in close contact.

5. The combination with three parallel KOO helical wire springs two in contact the third In witness whereof I have hereunto set my equidistant from both, of a plurality of tri hand this 8th day of July, 1904. angular washers each having an 8-shaped hole and a circular hole. JOHN RIDDELL' 5 6. In a belt, an elastic core member in the Witnesses:

form of a helical spring, and a covering of BENJAMIN B. HULL,

loose washers. HELEN ORFORD. 

